A pregnancy wheel to calculate gestational age from the known due date (EDC). Also gives conception date, 2nd and 3rd trimester start dates, and term date.

The pregnancy wheel. Gives current gestational age and due date. Also gives conception date, 2nd and 3rd trimester start dates, and term date.

checklist for evaluating patients with preterm contractions

modifiable and unmodifiable risk factors for preterm delivery